Ophthalmologic apparatus with ease of operation

Abstract

A measuring unit is mounted on a movable stage, which is movable in the right-left and front-rear directions relative to a fixed base stage. When an examiner moves the movable stage to the right or to the left by manipulating a joy stick, a micro switch detects that movement. Upon reception of a detection signal from the micro switch, a microcomputer allows power to be supplied to measurement circuits, to initiate a measurement mode. When judging that proper alignment has been established, the microcomputer automatically calculates a cornea shape. Measurement and calculation of a cornea shape are repeated until a standard deviation of measurement data falls within a given value. Upon completion of the measurement operation, the microcomputer stops the supply of power to the measurement circuits, to cancel the measurement mode.

What is claimed is: 
     
       1. An ophthalmologic apparatus comprising: measuring means for measuring an eye of a subject;   a movable stage on which the measuring means is mounted;   moving means for moving the movable stage horizontally relative to a fixed base stage;   recognizing means for recognizing whether the measuring means has been moved by the moving means so as to go out of a predetermined range; and   transition means for starting supply of power to the measuring means based on a recognition result of the recognizing means, to thereby render the measuring means operational.   
     
     
       2. The ophthalmologic apparatus according to claim 1, wherein the recognizing means comprises detecting means for detecting movement of the movable stage in a right-left direction. 
     
     
       3. The ophthalmologic apparatus according to claim 1, further comprising fixing means for prohibiting horizontal movement of the movable stage relative to the fixed base stage, the fixing means being provided in the movable stage and the fixed base stage and including a recessed member and a protrusive member to be fitted into the recessed member. 
     
     
       4. The ophthalmologic apparatus according to claim 1, further comprising: an alignment detection optical system for projecting alignment targets to the eye and for detecting the projected alignment targets;   judging means for judging an alignment state based on a detection result of the alignment detection optical system; and   measurement instructing means for instructing, based on a judgment result of the judging means, the measuring means to start measuring the eye.   
     
     
       5. The ophthalmologic apparatus according to claim 4, wherein the measurement instructing means instructs the measuring means to continue measuring the eye until obtaining a predetermined number of measurement values that satisfy a given standard. 
     
     
       6. An ophthalmologic apparatus comprising: measuring means for measuring an eye of a subject;   a movable stage on which the measuring means is mounted;   moving means having an operation lever incapable of inclination, for moving the movable stage horizontally relative to a fixed base stage;   recognizing means for recognizing whether the measuring means has been moved by the moving means so as to go out of a predetermined range;   transition means for starting supply of power to the measuring means based on a recognition result of the recognizing means, to thereby render the measuring means operational;   an alignment detection optical system for projecting alignment targets to the eye and for detecting the projected alignment targets;   judging means for judging an alignment state based on a detection result of the alignment detection optical system; and   measurement instructing means for instructing, based on a judgment result of the judging means, the measuring means to start measuring the eye.   
     
     
       7. An ophthalmologic apparatus comprising: measuring means for measuring an eye of a subject;   a movable stage on which the measuring means is mounted;   moving means for moving the movable stage horizontally relative to a fixed base stage;   first recognizing means for recognizing whether the measuring means has been moved by the moving means so as to go out of a predetermined range;   transition means for starting supply of power to the measuring means based on a recognition result of the first recognizing means, to thereby render the measuring means operational;   second recognizing means for recognizing whether the measuring means has completed output of measurement data;   stopping means for stopping the supply of the power to the measuring means based on a recognition result of the second recognizing means.   
     
     
       8. The ophthalmologic apparatus according to claim 7, further comprising: third recognizing means for recognizing whether a predetermined measurement operation has been completed; and   output instructing means for instructing the measuring means to output the measurement data based on a recognition result of the third recognizing means.